Fix ticket #8858.

- When an Identify/Force Identify request is made in Tracker, if the target
  is a link, resolve it to its destination first. Fixes #8858.
- Have mime_update.sh explicitly mimeset the welcome/user guide scripts.

data/common/boot/post_install/mime_update.sh

@@ -24,6 +24,9 @@ done
 
 SYSTEM=$(/bin/finddir B_SYSTEM_DIRECTORY 2>/dev/null || echo "/boot/system")
 
+mimeset -f "$SYSTEM/bin/userguide"
+mimeset -f "$SYSTEM/bin/welcome"
+
 _progress 0.1 "system applications"
 mimeset -apps -f "$SYSTEM/apps"
 _progress 0.2 "documentation"

src/kits/tracker/PoseView.cpp

@@ -8365,7 +8365,7 @@ BPoseView::IdentifySelection()
 	int32 count = fSelectionList->CountItems();
 	for (int32 index = 0; index < count; index++) {
 		BPose* pose = fSelectionList->ItemAt(index);
-		BEntry entry(pose->TargetModel()->EntryRef());
+		BEntry entry(pose->TargetModel()->ResolveIfLink()->EntryRef());
 		if (entry.InitCheck() == B_OK) {
 			BPath path;
 			if (entry.GetPath(&path) == B_OK)